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Korean Journal of Horticultural Science and Technology
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Korean Society of Horticultural Science
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Changes in Fruit Quality of Tomato 'Dotaerang' Cultivar during Maturation and Postharvest Ripening
Park, Se-Won ; Lee, Ji-Won ; Kim, Young-Cheol ; Kim, Kwang-Yong ; Hong, Se-Jin ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 381~387
Quality of tomato ‘Dotaerang’ fruits was evaluated at various ripening stages on the vine and after harvest to establish the optimal harvest index. Fruit maturity was determined by fruit color grouped as six stages of mature green, break, turning, pink, light red, and red. Glucose and fructose contents were higher in gel part with seeds than in the flesh of tomato fruit. The contents were 10-14 mg‧g^-^1 FW and 14-19 mg‧g^-^1 FW, respectively. The highest soluble sugars were observed at red stage on the vine followed by those in posthavest ripening fruits harvested at pink to light red stages. The organic acids declined during ripening but showed no difference statistically between fruits at red stage on the vine and those ripened after harvest. Ascorbic acid increased progressed stages, especially turning to pink stages, which reached 300
g‧g^-^1FW in fruit at red statge on the vine. Also, carotenoids and lycopene contents increased during fruit ripening on the vine and after harvest. The contents were higher in postharvest ripening fruits of turning to light red at harvest than the other stages fruits on the vine and ripened after harvest. According to the fruit quality factors including taste, color, ascorbic acid, firmness, and weight loss, pink to light red stages on the vine is recommended for commercial harvest stage of tomato fruit.
Effect of Cooling Method on Growth and Yield of Tomato and Pepper Grown in Summer Season Greenhouse Culture
Choi, Young-Hah ; Kwon, Joon-Kook ; Lee, Jae-Han ; Kang, Nam-Jun ; Cho, Myeong-Whan ; Son, Beung-Gu ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 388~392
This experiment was conducted to investigate the efficiency of cooling according to the cooling methods and test the growth and yield of tomatoes and peppers grown in the greenhouses during summer. The cooling methods were composed of the non-cooling, daytime cooling, nighttime cooling and all-day cooling. The daytime cooling induced by evaporation system utilizing an air cooler, the nighttime cooling induced by air flow using a fan with radiator. The highest room temperature was 4
C lower in cooling than non-cooling and was 2
C higher in cooling than out door temperature. The relative humidity was 10 to 20% and 5% higher in daytime and nighttime cooling than non-cooling, respectively. The room temperature and the relative humidity of the daytime were affected greatly by outside environment. The growth and yield of tomatoes made little differences from the cooling methods because of the other factors such as flower organ demage by high temperature and fruiting chemicals. The growth of peppers were not significantly differences between cooling methods, while the yield was highest in all-day and nighttime cooling, followed by daytime cooling and non-cooling. Results showed that the cooling had a great effect on the fruiting and yield of peppers, because of complex factors such as nutrition accumulated by cooling and pollination accelerated by air flow.
Effect of Covering Materials on Drying Period and Quality of Dried Red Pepper in Plastic Film House
Kim, Eun-Ju ; Cho, Chung-Ho ; Kim, Ju ; Seo, Sang-Young ; Ryu, Jeong ; Choi, Yeong-Geun ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 393~397
The study was carried out to improve the red pepper quality and reduce the drying period by using different covering film materials inside plastic film houses. The mean temperature of drying bed was higher under polyethylene (PE), polypropylene (PP) non-woven fabric covering than under non-covering. Mean relative humidity was lower under PP non-woven fabric covering. Drying period was 2 to 3 days shorter by PP non-woven fabric covering than control in August, while 5 days shorter in September. The marketability was higher (90.5%) under PP non-woven fabric covering than under non-covering in cv. ‘Daemyung’, and PE non-woven fabric treatment was higher (96.2%) in cv. ‘Keumtab’. Hunter's color of dried red pepper was some high black shade net treatement. Sugar content of dried red pepper was higher (6%) in cv. ‘Daemyung’ than cv. ‘Keumtab’ and capsanthin was high in cv. ‘Keumtab’. However sugar, capsaicin and capsanthin contents did not differ significantly by covering material treatments.
Growth Characteristics of White Spine Cucumber by Bloomless Stock Cultivars
Seo, Jong-Bun ; Choi, Kyong-Ju ; Lee, Jin-Woo ; Yang, Won-Mo ; Chung, Soon-Ju ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 398~402
This study was carried out to select good bloomless rootstock in different varieties and root-zone temperature. The growth among bloomless stocks were not different and the yield were not different except c.v. Hikaripower in tested stocks. In growth of white spine cucumber using bloomless rootstock cultivars in different root-zone temperature, there were not significant differences among the root-zone temperature in 18
C and 22
C, but there were good growths of Koinyoubou, Unryu 7 and Yuyuikki black type cultivars were better than other cultivars. The growth at 14
C which was root-zone temperature, was lower than that at 22
C, about plant height is 20% and etiolation chlorosis was found on upper leaves around 12 days after since thermal treatment began.
Effect of Plant Growth Regulators on Fruit Set and Yield of Eggplant (Solanum melongena L.)
Lee, Jung-Soo ; Shin, Young-An ; Um, Yeong-Cheol ; Lee, Sang-Nam ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 403~406
Plant growth regulators (PGRs) can be used to induce fruit setting and development of eggplant during unfavorable winter conditions, such as low light intensity and low temperature. To select an effective PGR, optimal concentration, and spray interval, three PGRs (cloxyfonac, 4-CPA, and CPPU) at three levels of concentration and two spray intervals (once every day and every five days) were tested on eggplant planted in a plastic house. Fruit set and development were similar in cloxyfonac and 4-CPA. However, cloxyfonac at 490 mg‧L^-^1 produced higher marketable yield than the other treatments. Spray interval did not affect marketable yield. Therefore, cloxyfonac applied at 490 mg‧L^-^1 every five days was recommended because it is labor-saving.
Effect of Gamma Radiation Treatment on Growth and Antioxidative Capacity in Garlic (Allium sativum L.)
Park, Sin-Ja ; Kwun, In-Sook ; Kim, Jae-Sung ; Hwang, Jae-Moon ; Kwon, Soon-Tae ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 407~410
Garlic cloves exposed to various dose of gamma radiation (^6^0Co) were cultured in the field, and their growth potential, activity of antioxidative enzymes such as superoxide dismutase (SOD) and peroxidase (POD), DPPH radical scavenging capacity were investigated. Emergence of garlic sprouts were retarded by high dose of radiation, and survival rate of the garlic plant were markedly decreased by enhanced dose of radiation. Enzyme activity of SOD and POD at just after treatment were significantly increased by 5 or 10 Gy of radiation. However, SOD activity in the second generation garlic was not affected by the treatment, but POD activity in the second generation which were treated with 10 Gy was decreased to 46% of control. DPPH radical scavenging capacity of garlic clove extract was not changed immediately after radiation treatment, but that in second generations treated with 10 Gy were significantly increased to IC_5_0 21.7 mg as compared to control, IC_5_0 41.6 mg.
Field Test of Virus-Free Seed Garlics Derived from Tissue Culture
Hwang, Jae-Moon ; Kim, Jae-Ik ; Oh, Sei-Myung ; Uhm, Jeong-Sik ; Ha, Hyun-Tae ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 411~415
To establish the seed production system, field performance of seed garlics obtained through tissue culture in different generation and cultivars was evaluated at two garlic growing areas Uiseong and Yeochun from 1998 to 2002. Early generation (generation 1 and 2) after tissue culture was not well standing up in the open field, but plant growth and bulb development were stable after 4th generation. Seed garlic ‘Uiseong’ from 3-year growing bulbils from tissue culture derived plant showed higher productivity in bulb weight than 5th generation seeds from tissue culture. Field performance of seed garlic ‘Jungsun’ from the tissue culture was best in growth and bulb development among tested cultivars. Yeochun was supposed to be a good place for seed garlic production because bulb weight was higher in Yeochun area (350 m above sea level) compared in Uiseong area. Tissue culture methods combined with aerial bulbil growing system will be a good technique for the production of good seed garlics.
Optimum Size and Storage Method of Onion Sets for Spring Sowing Onion Production in Highland
Huh, Eun-Joo ; Woo, Jong-Gyu ; Kwon, Yeong-Seok ; Cho, Kwang-Soo ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 416~421
This study was conducted to investigate the feasibility of producing onion on highland using onion sets instead of transplanting. Onion sets of ‘Higuma’ and ‘Daegwallyung No. 1’ cultivars were produced in 2001 and divided into three groups by diameter. They were planted in Jinbu (37
66'N, 600 m above sea level) together with transplants raised for 50 days in plastic film and the yield was investigated. Effect of storage temperature before planting was also examined with the 11～20 mm diameter sets of ‘Daegwallyung No.1’. Yield of ‘Higuma’ was higher than that of ‘Daegwallyung No.1’. There was no significant difference in yield between transplants and the sets with diameter of 11～20 mm. The onion sets without high temperature treatment, which were stored at 4
C for 6 months before planting, started bulbing significantly earlier and bolted. However, the treatment of 28
C for one month before planting prevented bolting and early bulb initiation. These results suggested that the sets with diameter of 11～20 mm can replace transplants in producing onion on highlands with similar yield. In this practice, the onion sets stored at low temperature during winter must be treated high temperature of around 28
C at least for one month before planting.
Effect of Plug Cell Size on Seedling Growth of Summer Spinach
Yeoung, Young-Rog ; Jung, Mun-Kyo ; Kim, Byung-Sup ; Hong, Se-Jin ; Chun, Chang-Hoo ; Park, Se-Won ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 422~425
This study was carried out to investigate the effect of plug cell size on the seedling growth and to provide a guideline for practical production of spinach (Spinacia oleracea L.) in the summer season. Leaf length reached to 8.7cm at 30 days after seeding in 200 cells plug tray. Plants grown in 288, 406 (A) and 406 (B) had the leaf lengths of 7.3, 5.6 and 7.0cm, respectively. Seedlings grown in 200 cells had larger leaf blades (4.4cm) as compared to those in the other cells. Seedlings grown in 200, 288, 406 (A) and 406 (B) had 7.2, 7.2, 5.4 and 5.4 in number of leaves, respectively. The greatest fresh weight was achieved in seedlings grown in trays of 200 cells, followed by 288 cells, 406 (B) and 406 (A) cells. Dry weight showed a similar trend to fresh weight. Leaf length, leaf blade length, leaf width and fresh weight generally increased as plug cell sizes became larger. From the above results, 288 cell trays are recommended for spinach seedling production based on economic view.
Characteristics of Growth and Flowering by Nitrogen Levels in Sedum sarmentosum
Lee, Seung-Yeob ; Ahn, Jeong-Ho ; Kim, Hyo-Jin ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 426~430
Sedum sarmentosum Bunge is one of the favorite fresh-vegetables during winter and spring seasons in Korea. To determine the optimum nitrogen fertilization for the production of high quality vegetable, S. sarmentosum was cultivated by cutting propagation in the pot (1/5,000a) and field experiments treated with different levels of nitrogen 0, 5, 10, 15, 20, 30 kg/10a and 0, 10, 15, 20, 25 kg/10a, respectively. In pot cultivation, plant height, number of stem, fresh weight and dry weigh were increased along with added nitrogen level, but they showed no significances in 15～30 kg/10a of nitrogen. SPAD value increased along with added nitrogen level, and it showed no significance in 10～30 kg/10a of nitrogen. The value of L measured by chromameter showed a tendency to decrease along with added nitrogen level. Number of flower stock in Keumsan local strain was decreased according to higher nitrogen level, and it was the highest in 10 kg/10a of nitrogen. Wanju local strain was not bloom in all treatments. In field cultivation, plant height and number of stem were increased with higher nitrogen level, but they were not significant except 0 kg/10a of nitrogen. Other characteristics in field cultivation showed no significances among nitrogen levels. Fresh weight and dry weight were linearly increased according to higher nitrogen level, they were not significant among 15～20 kg/10a of nitrogen levels. The nitrogen level for high quality and maximum growth of S. sarmentosum was 15 kg/10a. Keumsan local strain with abundant flower stock and branches was desirable as a garden plant, and Wanju local strain with higher yield and non-flowering characteristics was favorable as an edible cultivar.
Hybrid 'Excu 3' in White Spine Cucumber
Seo, Jong-Bun ; Choi, Kyong-Ju ; Kim, Hee-Gon ; Chung, Soon-Ju ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 431~433
A new white spine cucumber (Cucumis sativus L.) ‘Excu 3’ was selected from the cross of ‘Alphafushinari’ (Kurume Vegetable Breeding Co., Japan), and ‘Sharp 301’ (Saitama Vegetable Breeding Co., Japan), from 1999 to 2001 in Jeollanam-do Agricultural Research and Extension Services. The new cultivar was vigorous and significantly resistant to brown leaf spot symptom. The percentage of female flower and lateral shoot occurrence in ‘Excu 3’ cultivar were 76% and 72%, respectively. The yield showed 43.7 MT/ha, 34% more than check variety.
Breeding of Strawberry 'Maehyang' for Forcing Culture
Kim, Tae-Il ; Jang, Won-Suk ; Choi, Jae-Hyeon ; Nam, Myeong-Hyeon ; Kim, Woon-Seop ; Lee, Sok-Su ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 434~437
‘Maehyang’ is a new strawberry (Fragaria X ananassa Duch.) cultivar, which was released by Nonsan Strawberry Experiment Station of Chungnam ARES in 2002. In 1997, This cultivar was originated from a cross between ‘Tochinomine’ and ‘Akihime’ and showed excellent characteristics including weak dormancy, vigorous growth, high yield and fruit quality. It was named ‘Nonsan No. 2’ as line name after examining the productivity in forcing culture from 1998 to 1999. Again, after regional adaptability test between 2000 and 2001, the cultivar name, ‘Maehyang’, was imposted on this cultivar. The general characteristics of ‘Maehyang’ include high vigor and erect type in growth. The flowering and harvesting date of ‘Maehyang’ are similar to that of ‘Nyoho’, but earlier than ‘Redpearl’. The fruit shape is long and conic, fruit color is red, and fruit quality was superior to that of ‘Redpearl’. The average fruit weight of ‘Maehyang’ is about 15g and the marketable yield is relatively high because of low percentage of abnormal fruit bearing. It is resistant against powdery mildew but sensitive to anthracnose and aphids. ‘Maehyang’ is suitable for forcing culture because it shows weak dormancy, high yield and fruit quality.
Tree Growth and Changes of Hormonal Contents in Shoot Tips and Xylem Sap Effected Bending Angle of Lateral Branch in One-Year Old 'Fuji'and 'Hongro'/M.9 Apple Trees
Kim, Seung-Heui ; Park, Jeong-Gwan ; Seo, Hyeong-Ho ; Kim, Jeom-Kuk ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 438~443
Effect of bending angle of lateral branch on tree growth was studied in ‘Fuji’ and ‘Hongro’ apples. Tree growth was favored by bending angle of 120 than 60 or 90 in ‘Fuji’, while that of ‘Hongro’ was favored by 90 or 120 than 60. Number of shoot were higher in the order of 120 > 90 > 60 bending angle. The wider angle favored the formation of flower buds in the bending angle range of 60 to 120 in both cultivars. Trans-zeatin content in xylem sap peaked on June 30 with 28.3ng in ‘Fuji’ and 46.6ng in ‘Hongro’. And the content increased as bending angle narrowed. Shoot tip IAA content of laterals was the highest in bending angle of 60 and was the lowest in 120.
Shoot Growth and Mineral Concentration in 'Niitaka' Pear Trees with Floral Bud Necrosis
Kim, Jeam-Kuk ; Kim, Seung-Heui ; Yim, Youl-Jae ; Seo, Hyeong-Ho ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 444~447
The causal factors for flower bud necrosis, the newly reported physiological disorder in ‘Niitaka’ pear (Pyrus pyrifolia), were examined for four years from 2000 to 2003. Affected flower buds could not bloom and finally died, leaving loose and desiccated bud scales that eventually disintegrated. Flower bud necrosis were frequently observed in orchards were supplied excessive nitrogen and heavy pruning, and at low altitude in the slopping orchard. Affected trees were showed strong vegetable growth in late season with higher nitrogen content in leaves, current shoot bark and wood.
Effect of Root Pruning on Growth and Fruiting of Peach Trees
Choei, Dong-Geun ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 448~452
The effect of root pruning on growth and fruit quality of ‘Yumyung’ peach trees was determined over multiple years. The trees used were 10 year-old and vegetatively excessive in the high-density orchard system. The trees were root-pruned at both sides of the tree at a distance of 50, 100 or 150cm from the trunk, all at 30cm in depth. The determination of the pattern of root distribution showed that more than 97% of the roots were remained within 150cm from the trunk, while 76% of the total roots were remained within 50cm from the trunk and 91% within 100cm. As for vertical root distribution, more than 90% of the roots were remained in the soil of 50cm in depth, while 54% in 30cm and 81% in 40cm in depth. Root pruning decreased the number of new shoots; with the root pruning practiced closer to the trunk being more effective. Root pruning significantly increased the level of PAR (Photosynthetic Active Radiation) in the canopy compared to no root pruning. Fruit size, especially diameter, were reduced by root pruning; the extent of size reduction was negatively correlated with the pruning distance from the trunk, and this effect was more obvious in the 2nd and 3rd year after root pruning than the 1st year. Yield was also reduced by root pruning significantly in the 50cm distance treatment in the 1st and 2nd year after root pruning. The amount of winter pruning was reduced by root pruning. It was concluded that root pruning in 50cm distance from the trunk was rather severe in terms of substantial reduction of vegetable growth, yield, and fruit size. The root pruning at a distance of 150cm showed its effect in the 1st year but disappeared in the 3rd year. The root pruning at 100cm proved to be the best treatment in terms of a reduction of vegetative growth without negative effects on fruit quality characteristics, while the effect remained for three years.
Salt Monitoring of Ground Water and Damage of Satsuma Mandarin (Citrus unshiu Marc.) as Influenced by Salinity Stress Using Sea Water
Han, Seung-Gab ; Kim, Young-Ho ; Moon, Kyung-Hwan ; Lim, Han-Cheol ; U, Zang-Kual ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 453~457
This study was carried out to survey the salt concentration of ground water and the symptoms of salinity damage of citrus tree, and also to investigate the tolerable salts concentration of water for satsuma mandarin tree because the possibility of seawater inflow in ground water was increasing near seashore areas. The average of pH of ground water was 7.4. The 3.3 percentages of surveyed orchards showed high EC values over 1.0 dS m^-^1 and the highest was 4.5 dS m^-^1. The 4.5 percentages of orchards showed exceeding values of acceptable Cl concentration for agricultural use (250 mg L^-^1), and the highest was 1,359 mg L^-^1. Especially Cl concentration was higher near seashore than other places. The high Cl concentration orchard showed 1.4 dS m^-^1 of EC value which was 14 times higher than that of normal orchards and the trees in the orchard showed also the symptoms of damage such as growth retardation and leaf burn. After treatment of the various diluted solution of seawater (seawater : distilled water = 1 : 10 ～1 : 160), the symptoms of damage were appeared on the leaves several months later. With the treatment of 1/10 diluted seawater (1,672 mg L^-^1 of Cl) spray, symptoms were appeared 4 months later, and defoliation was 14.6%. And in case of 1/20 dilution (800 mg L^-^1 of Cl) treatment, symptoms were showed 5 months later and defoliation was 9.9%. But, there were no symptoms on leaves and significant difference of defoliation Percentage from control after treatment of 1/40 or less diluted seawater.
Breeding of Early Season Grape Cultivar 'Tamnara' (Vitis hybrid) with High Quality and Disease Resistance
Park, Kyo-Sun ; Yun, Hae-Keun ; Seo, Heung-Soo ; Jeong, Sang-Bouk ; Cho, Hyun-Mo ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 458~461
‘Tamnara’ was originated from the cross between ‘Campbell Early’ (Vitis labruscana) and ‘Himrod Seedless’ (Vitis sp.) in grape breeding program for disease resistance and cold hardness by NHRI in 1981. ‘Tamnara’ had a budburst on 22 April, flowering on 4 June, and ripening on 7 September, similar to ‘Campbell Early’ at Suwon. The berry weight was 7.5 g, 2 g bigger than that of ‘Campbell Early’. It had a total soluble solids (TSS) of 17.2%, about 3% TSS higher than ‘Campbell Early’, and low acidity (0.39%). The clusters were cone-shaped (conical) and had circular, juicy, and black-skin colored berries with abundant blooms. Clusters with moderately dense berry setting required no cluster thinning and resulted in low incidence of fruit cracking. ‘Tamnara’ vines had good cold hardness, resistance to downy mildew and anthracnose. It is recommended that ‘Tamnara’ be planted as replacement for ‘Campbell Early’, the leading table grape in Korea.
Breeding of a Black Table Grape Cultivar 'Heukgoosul' (Vitis sp.) with Large Berries and High Quality
Park, Kyo-Sun ; Yun, Hae-Keun ; Seo, Heung-Soo ; Jeong, Sang-Bouk ; Chung, Kyeong-Ho ; Jun, Ji-Hae ; Cho, Hyeon-Mo ; Kang, Sang-Jo ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 462~466
‘Heukgoosul’ (4X), resulted from the cross between ‘Golden Muscat’ (2X, Vitis sp.) and ‘Pione’ (4X, Vitis sp.) in grape breeding program by NHRI in 1988, was preliminarily selected in 1995. After regional adaptability tests under the name of ‘Wonkyo RA-07’ at seven sites during 1996∼2000, it was finally selected in 2000. Although most tetraploid cultivars had a berry shattering problem, ‘Heukgoosul’ showed a low incidence of berry shattering, resulting in a good berry set compared to ‘Kyoho’. ‘Heukgoosul’ had a budburst on 21 April, flowering on 3 June, and fruit maturity 15 September (almost same as ‘Kyoho’ at Suwon), and it was considered a midseason cultivar. The mean berry weight was 14.4 g, about 2.6 g bigger than ‘Kyoho’, and mean soluble solids were 18.4̊Bx (similar to ‘Kyoho’). The skin color was black with abundant bloom and the flesh firmness was soft and juicy. It was recommended that it be pruned to 6 to 12-node canes, 2 to 4 nodes shorter than ‘Kyoho’, because it is not as vigorous. ‘Heukgoosul’ may be a substitute for ‘Kyoho’, due to its large sized berries with high quality and several characteristics for facilitating vineyard management such as good cold hardness, good disease tolerance.
Composition of Growth Medium Using Used Rockwool and Chestnut Woodchips for the Mat-Subirrigated Hydroponic Culture of Potted Miniature Rose 'Silk Red'
Kim, Gyeong-Hee ; Jeong, Byoung-Ryong ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 467~472
This study was conducted to determine a suitable medium composition using particles of recycled rockwool slabs (PRRS), woodchips, perlite and peatmoss for a mat-subirrigated hydroponic culture of a potted miniature rose ‘Silk Red’. The used rockwool slabs were collected from a commercial hydroponic greenhouse after growing tomato crops and were shredded and steam-sterilized. The 15 to 30 years old chestnut wood was shredded into chips and weatherized for four months in the open air. The PRRS and CWC (chestnut woodchips) were mixed with perlite and/or peatmoss at various volume ratios to make 20 different mixtures and the ‘Silk Red’ plant was cultured in pots with three replications per treatment in a randomized block design. Plant height, number of branches, flowers and nodes, plant width, shoot fresh and dry weights, and T/R ratio were significantly affected and fresh and dry weights of root were slightly affected by medium composition. Whereas number of nodes on the longest new shoot, total chlorophyll concentration, and percent dry matter were not significantly affected by the treatment. The mixture of 50% PRRS, 25% perlite and 25% peatmoss (v/v) gave the greatest overall plant growth. Compared with the control, a commercial medium (Tosilee medium, Shinan Grow Co, Jinju), 100% PRRS treatment gave better plant growth and development except in root fresh weight. In conclusion, the most growth promoting mixture was composed of 50% PRRS, 25% perlite and 25% peatmoss in a mat-subirrigated culture of potted miniature rose ‘Silk Red’.
In vitro Propagation and Enlargement of Lilium hansonii
Goo, Dae-Hoe ; Yae, Byeong-Woo ; Han, Bong-Hee ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 473~476
This study was conducted to investigate mass propagation and enlargement condition of Lilium hansonii. In the treatment of plant growth regulators (PGRs), 0.01 mg‧L^-^1 6-benzyl amino purine (BA) and 0.1 mg‧L^-^1 α-naphthalene acetic acid (NAA) was more effective for formation of bulblets as 3.4 bulblets per scale. In the treatment of sugars concentration, 6% glucose was more effective for enlargement and fresh weight of bulblets, and fructose 3% was more effective for formation of bulblets. In the treatment of temperature, 25
C was more effective for growth and enlargement of bulblets. In the effects of gelrite and activated charcoal, 0.1 g‧L^-^1 of gelrite and 0.1% activated charcoal were more effective for growth and enlargement of bulblets.
Proliferation and Enlargement of Lilium Asiastic Hybrids by Bioreactor and Solid Medium Culture
Goo, Dae-Hoe ; Park, Myoung-Hee ; Moon, Sun-Young ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 477~480
For in vitro proliferation and enlargement of bulblet in Lilium asiatic hybrids, ‘Hongwha’ and ‘Mirr’ cultivar were used with solid and bioreactor liquid medium. In the treatment of growth regulators, BA 1.0 mg‧L^-^1 and IAA 0.1 mg‧L^-^1 concentration was more effective for fresh weight of ‘Hongwha’ as 970.6 mg, the number of bulblets per scale were more at BA 0.1 mg‧L^-^1 and IAA 0.1 mg‧L^-^1 concentration as 5.8 ea., the fresh weight of bulblet was 301.4 mg at BA 1.0 mg‧L^-^1 and IAA 0.5 mg‧L^-^1 concentration. In the treatment of ‘Mirr’, the fresh weight was 942.1 mg at BA 0.1 mg‧L^-^1 and IAA 0.1 mg‧L^-^1 concentration, the numbers of bulblets per scale were more at the same concentration of ‘Hongwha’ as 4.8 ea., the fresh weight of bulblets was higher in the same concentration of ‘Hongwha’ with BA 1.0 mg‧L^-^1 and IAA 0.5 mg‧L^-^1 as 153.7 mg. In the bioreactor liquid culture of ‘Hongwha’, the MS + 6% sucrose + 0.1% activated charcoal medium was more effective for total fresh weight, fresh weight of bulblets and diameter of bulblet as 14.7 g, 4.6 g and 2.1 cm respectively. And the fresh weight of bulblets was two times compare to control. In the bioreactor liquid culture of ‘Mirr’, the 1/2MS + 6% sucrose + 0.1% activated charcoal medium was more effective for total fresh weight, fresh weight of bulblet and diameter of bulblet as 13.6 g, 6.0 g and 2.2 cm respectively. Medium added activated charcoal was more effective for growth and enlargement of bulblet.
Mass Propagation of Scilla violacea Hutch. through in vitro Culture of Flower Stalk Nodes
Lee, Eun-Jeong ; Song, Min-Jeong ; Kim, Myung-Jun ; Ko, Jeong-Ae ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 481~485
This study was conducted to establish the system of rapid propagation by flower stalk node culture of Scilla violacea Hutch. We tested the effects of plant growth regulators, salt contents of modified MS medium and sucrose concentration on bulblet formation and expansion. Two distinct pathways, organogenesis through callus and direct bulblet formation, could be recognized in flower stalk node culture of Scilla violacea Hutch. Up to the 100% of bulblet and shoot organogenesis from the flower stalk node attached with pedicel seven days before anthesis was effectively induced by MS medium supplemented with 0.5 mg‧L^-^1 NAA and 1.0 mg‧L^-^1 BA. Half-strength MS media supplemented with 0.5 mg‧L^-^1 NAA and 1.0 mg‧L^-^1 BA was more effective than quater-strength or MS medium for induced and maintained a large number of bulblets. Three percent sucrose treatment enhanced bulblet formation and 6 percent treatment sucrose expanded the bulblets. Plantlet regeneration was successfully achieved from bulblets, from flower stalk node with pedicel-derived callus, via shoot bud induction or direct bulblet formation.
Analysis of Phenotypic and Genetic Polymorphism of Self-pollinated Seedlings of Korean Native Cymbidium goeringii
Lee, Jong-Suk ; Kim, Bo-Min ; Yu, Sung-Oh ; Ryu, Ki-Hyun ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 486~490
RAPD analysis of leaf patterns from phenotypic expression and genetic diversification of self-pollinated seedlings of the Korean native Cymbidium goeringii was investigated. The leaf color patterns could be classified into five categories; green, green flecked mediovariegata, variegata, greenish yellow and yellowish green misted variegata. According to the visual observations, 26 plant leaves were green (56%), 9 were green mediovariegata (19%), 8 were flecked variegata (17%), 2 were greenish yellow (4%), and 1 was yellowish green misted variegata (2%). Of the self-pollinated Cymbidium seedlings, an average of 46 plants had leaf petals with a width that ranged from 3.9 to 13.2 cm, while two plants, expressed extremely dwarfed leaf widths of 4.4 cm and 3.9 cm respectively. The polymorphism of DNA bands in 46 Cymbidium seedlings through manipulation of ten types of primers using RAPD methodologies showed 137 bands, consisted of 134 polymorphic and 3 monomorphic bands. The size of the amplified DNA band ranged from 300 to 2,500 bp, and overall similarity value ranged from 0.590 to 0.874. The results of analysis of collected data through the method of UPGMA clustering can be categorized into six subgroups. Group I covered six plants (13%), Group II covered six plants (13%), Group III covered nine plants (19.6), Group IV covered 13 plants (28.3%), Group V covered four plants (8.7%), and Group VI covered six plants (13%). The two plants, numbers 13 and 19, were patternless dwarf types and even in the case of being found to have a genetic similarity relationship, they did not fit any of the above six categories.
Expression of Enhanced Green Fluorescent Protein (EGFP) Gene in Taraxacum mongolicum H. Mazz
Kim, Young-Sook ; Kim, Mi-Young ; Kim, Myung-Jun ; Ko, Jeong-Ae ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 491~494
To develop an efficient protocol for the transformation of the Taraxacum mongolicum H. Mazz, hypocotyls taken from 6-day old plantlets were infected with Agrobacterium tumefaciens LBA4404 harboring the binary vector which carries the reporter gene EGFP (enhanced green fluorescent protein) and the kanamycin resistance gene npt II. Infected explants were cocultured on shoot induction medium with 0.5 mg‧L^-^1 NAA, 1.0 mg‧L^-^1 BA (SI medium). After 2 days of culture, explants were transferred to SM medium (SI medium with 50 mg‧L^-^1 kanamycin). Putative transformed shoots were selected on SM medium. Integration of EGFP gene into host plant chromosome was confirmed through genomic PCR with specific primer in EGFP gene and npt II gene. In addition, expression of introduced EGFP gene was observed in transformed Taraxacum mongolicum using fluorescent microscope. These results suggest that transformants containing the useful foreign gene could be produced using Agrobacterium tumefaciens-mediated transformation system in Taraxacum mongolicum.
Breeding of a New Tetraploid Bletilla striata Reichb. fil., 'Chungbuk Jaran'
Yun, Jong-Sun ; Hong, Eui-Yon ; Kim, Ik-Hwan ; Shin, Kyun ; Yun, Tae ; Lee, Cheol-Hee ; Kim, Tae-Su ; Paek, Kee-Yoeup ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 495~498
‘Chungbuk Jaran’, a new tetraploid Bletilla striata Reichb. fil. was produced by applying 0.4% (w/v) aqueous colchicine to pseudobulbs for 120 hours. Ploidy level was determined by cytological chromosome counting and flow cytometry. ‘Chungbuk Jaran’ had longer plant height and thicker stems that could support the flowers better than diploid. And it had larger and darker green leaves than its diploid counterparts. Flowering period and number of flowers per stem of ‘Chungbuk Jaran’ were not significantly different from those of diploid. But the flower natural spread and the petals of ‘Chungbuk Jaran’ were larger and fuller than those of the diploid. Consequently, ‘Chungbuk Jaran’ was horticulturally superior to the diploid form.
Effect of Horticultural Therapy on Improvement of Mental Health and Social Adaptability of Schizoid of the Open Ward
Jeong, Mi-Hwa ; Lee, In-Sang ; Chung, Yong-Mo ; Jeong, Soon-Jae ; Youn, Chul-Ho ; Cho, Hyun-Gu ; Yi, Young-Byung ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 499~503
This study was conducted to investigate the effect of horticultural therapy (HT) on the improvement of mental health and social adaptability of schizophrenic patients. Significant effectiveness could be seen in the evaluation of self-esteem and interpersonal relationship. In terms of social behavior scale, there was no significant effectiveness in the substance of conversation. However, effectiveness was improved in terms of verbal and non-verbal areas. Symptom checklist -90- revision evaluation shows a significant improvement in somaticization disorder, obsessive-compulsive, depression, paranoid ideation and psychoticism areas. In evalution of HT, there wes a significant improvement in participation, self-concept and identity, condition and problem solving, exercise perceptivity and life-tasks skill and vocational adjustment. As of the results above, HT program was found to be very effective in psychological stabilization and in social adaptability of schizophrenic patients who tend to be depressed and locked out from human relationship.
Packaging Patterns of Potting Plants and Itemized Application
Heo, Buk-Gu ; Yoo, Yong-Kweon ; Song, Chae-Eun ; Baek, Jin-Ju ; Park, Yun-Jum ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 504~508
Packaging pattern of potted plants was investigated through photography analysis. Photographs were obtained on 109 actual display pots and 189 pictures introduced in textbooks. We also conducted a survey of the application of packaging patterns for potting plants on 35 flower shop's managers. The packaging patterns were classified according to both the packaging portion and techniques. The packaging portion of potting plants was divided into six classes, such as the roots, flowerpot, flowerpot including the roots, flowerpot including the plants, flowerpot including both the roots and plants, and the others. The packaging portion reveals that there is an increase in order; flowerpot including the roots (43.1%) > the roots (22.2%) > flowerpot including both the roots and plants (9.4%) > flowerpot including plants (7.7%). Packaging techniques were divided into five classes, such as the attachment, twine, rolling up and mixed thing in all. In general, flower shop's managers applied to a kind or two to three kinds of packaging techniques at a time. It was popular in the packaging of the flowerpot including the roots for oriental orchids, and the packaging of the roots and/or of flowerpot including the roots for both Cymbidium and moth-orchid were well estimated. In case of big sized ornamental plants, the managers set a high value on the packaging of the roots and/or of flowerpot including the roots. In addition, it was evaluated that small and middle sized ornamental plants could be well fitted in all packaging patterns.
Decaying Conditions in Water for Skeletonizing Leaves in Magnolia kobus
Sohn, Kwan-Hwa ; Kwon, Hye-Jin ; Kim, Eui-Young ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 509~514
To skeletonize leaves as floral design materials, optimum collecting time, microorganisms, leaf tissue characteristics, and leaf components related to leaf decaying in water, were investigated in Magnolia kobus, Ficus religiosa, and Magnolia obovata, semimonthly from May 20 to Nov. 5, 2003. Regardless of date, decaying of F. religiosa leaves was the fastest and took 12-29 days. M. kobus leaves were decayed the fastest in August and skeletonized within 30 days in case that water temperature was maintained 30
C. The number of microorganism was 7.7×10^7 at 30
C after 12 days in water. The leaves of M. obovata weren't decayed in water at all. The main microorganisms for three plants found in water were Pseudomonas aeruginosa and Stenotrophomonas maltophila. There was not distinctive relation between leaf tissue and leaf decaying rate. F. religiosa leaves which were decayed the fastest in water had the least lignin content and M. obovata the most.
Recent Progresses for the Variety Classification and Denomination of Oriental Melon and Melon (Cucumis melo L.)
Lee, Seung-In ; Kwon, Yong-Sham ; Bae, Kyung-Mi ; Song, In-Ho ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 4, 2004, Pages 515~522
Melon (Cucumis melo L., 2n = 24) including oriental melon contains genetically very diverse varieties. Wild and cultivated melon types have been found of different geographical origin and Africa has been proposed as a possible center of the diversity. The domestication of melon might have occurred independently or in parallel in Asia and Africa since nearly 4000 years ago. The high polymorphism of melons has largely derived from the recombinant cultivars between varieties and its open pollination characteristics in nature, which led botanists to propose different infraspecific classifications. Korea has long history of cultivation for oriental melon, with large varieties of landrace and market classes including ‘Geumssaraki’ type. And botanical nomenclature system such as cantalupensis, reticulatus, and makuwa etc. have been used for the variety denomination. But, ever since the introduction of the system, many progresses have been achieved in the field of nomenclature, breeding and molecular genetics, which suggest critical review on the current situation and consideration for establishment of new system. This paper reviews the recent advances related with classification and nomenclature and give some comments for the efficient and scientific description of C. melo species.